Experts are concerned that the company has not been more forthcoming about two participants who became seriously ill after getting its experimental vaccine
A laboratory worker handles essay tubes at the production plant of mAbxience biotechnology company on August 13, 2020 in Garín, Argentina. The Argentina lab, property of Grupo Insud, will co-manufacture with Mexico the coronavirus vaccine created by Oxford University and Swedish-British pharmaceutical firm AstraZeneca. (Photo by Ricardo Ceppi/Getty Images)
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